Necklace lengthener



FIG. 1 is a perspective view of a necklace lengthener showing my new design;

FIG. 2 is a side elevational view;

FIG. 3 is a top plan view, the bottom being a mirror image;

FIG. 4 is a right side elevational view; and

FIG. 5 is a left side elevational view. 

The ornamental design for a necklace lengthener, asd shown and described. 